Antifungal and Antioxidant Properties of Chitosan Polymers Obtained from Nontraditional Polybius henslowii Sources

Chitin was extracted from , a swimming crab, captured in large quantities throughout the Portuguese coast by purse seine vessels as bycatch. After standard chitin extraction procedures, water-soluble chitosan products were obtained via two different methods: (1) -acetylation with the addition of ace...

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Bibliographic Details
Published in:Marine drugs 2019-04, Vol.17 (4), p.239
Main Authors: Avelelas, Francisco, Horta, André, Pinto, Luís F V, Cotrim Marques, Sónia, Marques Nunes, Paulo, Pedrosa, Rui, Leandro, Sérgio Miguel
Format: Article
Language:English
Subjects:
Acetic anhydride
Acetylation
Analytical methods
Antifungal activity
Antifungal agents
antioxidant activity
Antioxidant properties
Antioxidants
Body parts
Bycatch
Chelation
Chitin
chitooligosaccharides
Chitosan
Cosmetics
Crustaceans
Extraction procedures
Fourier transforms
Fungicides
Gels
Hydrogen
Hydrogen peroxide
Infrared spectroscopy
Lipids
Liquid chromatography
Low molecular weights
Marine crustaceans
marine resources
Metals
Molecular structure
Molecular weight
Oxidative stress
Pathogens
Polybius
Polybius henslowii
Polymers
Properties
Proteins
Purse seines
Raw materials
Scavenging
Swimming
Viscosity
Water chemistry
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Summary:Chitin was extracted from , a swimming crab, captured in large quantities throughout the Portuguese coast by purse seine vessels as bycatch. After standard chitin extraction procedures, water-soluble chitosan products were obtained via two different methods: (1) -acetylation with the addition of acetic anhydride and (2) a reaction with hydrogen peroxide. The chemical structure and molecular weight of chitosan derivatives, water-soluble chitosan (WSC) and chitooligosaccharides (COS), were confirmed by Fourier Transform Infrared Spectroscopy (FT-IR) and gel permeation chromatography (GPC). Antioxidant and metal chelation activities were evaluated, and the growth inhibition capacity was tested on four phytopatogens. The chitooligosaccharides from pereopods (pCOS) and shell body parts (sCOS) inhibited all fungal species tested, particularly with 84.7% and 85.5%, respectively. Both radical scavenging and antifungal activities proved to be dose-dependent. Chitooligosaccharides with a low molecular weight (2.7, 7.4, and 10.4 Kg·mol ) showed the highest activity among all properties tested. These results suggested that chitosan derivatives from raw material could potentially be used against phytopathogens or as ingredient in cosmetics and other products related to oxidative stress.
ISSN:1660-3397
1660-3397
DOI:10.3390/md17040239